The Percent Equation / HW #10.1
Weekly Review #13
due tomorrow
Friday 1/16 / Lesson10.2
The Percent Equation- Part II / HW #10.2
Tuesday 1/20 & Wednesday 1/21 / Quarterly Review &
Midterm Exam
Thursday 1/22 / Lesson 10.3
Using the Percent Equation
Tax and Commission / HW #10.3
Weekly Review #14
due tomorrow
Friday 1/23 / Lesson 10.4
Tax, Tips, and Simple Interest / HW #10.4
Monday 1/26 / Lesson 10.5
Percent Increase & Decrease / HW # 10.5
Tuesday 1/27 / Lesson 10.6
Mark Ups & Mark Downs / HW #10.6
Wednesday 1/28 / Review / HW: # 10.7
Thursday 1/29 / Review / HW # 10.8
Weekly Review #15
due tomorrow
Friday 1/30 / Test Unit 10 Percents
Review section on
Equations & Inequalities
Homework 10.1 Using the Percent Equation
No work, no credit.
1. What is 30% of 140?2. Samuel has a collection of 170 marbles. In the collection, 10% of the marbles are red and the rest are blue. Which statement accurately describes Samuel’s marble collection?
Circle your choice, support it with work.
157 marbles are red and 13 are blue.
153 marbles are red and 17 marbles are blue
17 marbles are red and 153 marbles are blue
13 marbles are red and 157 marbles are blue
3. The Richardson family collects seashells. They have a total of 75 seashells in their collection. They classified the seashells and found that they have 11 cockle shells, some conch shells, and a variety of other kinds of shells that make up 60% of their collection. How many shells in their collection are neither conch shells nor cockle shells?
4. 150 is what percent of 625?
More than half of children use social media by the age of 10: Facebook is most popular site that youngsters join
· 52 per cent of eight to 16-year-olds ignored Facebook's age limit
· Other popular sites include WhatsApp, BBM, SnapChat and Ask.fm
· 43 per cent had messaged strangers, starting from an average age of 12
By Daily Mail Reporter
More than half of children have used an online social network by the age of 10, according to a study.
Facebook tops the list of sites that children sign up to under-age, with 52 per cent of eight to 16-year-olds admitting they had ignored the official age limit, the Social Age report for online safety advisory website Knowthenet found.
Other popular sites include WhatsApp, used by 40 per cent of eight to 16-year-olds, BBM (24 per cent), SnapChat (11 per cent) and Ask.fm (8 per cent).
Researchers have found more than half of children have used an online social network by the age of 10
The study found that although 59 per cent of children are social networking by 10 years old, just 32 per cent of parents feel 'very confident' about helping them stay safe online.
The poll found 21 per cent of children had posted negative comments, starting from an average age of 11, and 26 per cent had 'hijacked' another person's account and posted without permission.
Some 43 per cent had messaged strangers, starting from an average age of 12.
The study suggests that children are most likely to post an image or video of themselves online or set up a fake profile for the first time at the age of 11, try Twitter and message a stranger at 12 and try services like SnapChat and Ask.fm at the age of 13.
Two thirds (67 per cent) turn to their parents when they experience difficulties online, the poll found.
While 63 per cent of parents check their child's internet activity at least once a week, more than a fifth (21 per cent) are not confident they could install parental controls, and just under a half (46 per cent) admit not being confident or aware of the school internet policy.
Other popular sites include WhatsApp (right), used by 40 per cent of eight to 16-year-olds, and SnapChat (left)
Dr Richard Woolfson, child psychologist and Knowthenet spokesman, said: 'The internet offers wonderful experiences for growing and inquisitive young minds.
'Yet, as social media has removed the barriers between a young person's public and private self, children can become vulnerable, and compulsive online sharing can lead to danger.
'As this study shows, children are gaining access to social media sites at a younger age, which could expose them to content, people or situations that are out of their depth and which they're not emotionally prepared for.
'Parents can no longer protect children by simply trying to limit their online experiences. Instead parents need to maintain an open dialogue and encourage children to share both good and bad online experiences, talk openly and straightforwardly about the risks they may encounter online without scaring them and make sure they keep up with the latest social media crazes and work with their children rather than trying to control them.'
http://www.dailymail.co.uk/news/article-2552658/More-half-children-use-social-media-age-10-Facebook-popular-site-youngsters-join.html
1. Locate the following information in the article, then highlight it:
PercentStudents signing up for Facebook between ages 8 – 16
Students using WhatsApp between ages 8-16
Student using SnapChat between ages 8-16
Parents who feel confident keeping their children safe online
Students who post negative comments
Students who messaged strangers
2. According to the statistics above, and the fact that there are 390 students that attend Salk, how many would be using Facebook?
3. Opinion: Is there an appropriate age to begin using social media? Explain in at least 4 sentences and cite evidence (or statistics) from the article to support your opinion.
______
______
______
______
______
Homework 10.3 Tax and Commission
No work, no credit
1. Find the sales tax.2. A salesperson at a jewelry store earns 8% commission each week. Last week, Heidi sold $530 worth of jewelry. How much did she make in commission? How much did the jewelry store make from her sales?
3. Ryan has a weekend job advertising an upcoming play. He has two options for being paid. Option A is an hourly wage of $7.75. Option B is a 6% commission on all money made at the play. He plans to work 8 hours each day on Saturday and Sunday. Ryan estimates that the play will make about $1,800 this weekend. Which option gives Ryan more earnings?
4. Find the commission.
Homework 10.4 Tax, Tip and Simple Interest
No work, no credit
1. Carrie earned 4% simple annual interest on $750 in a saving account. She kept all the interest she earned in the saving account. After one year, what was the total amount of money in her account?A) $1,050
B) $30
C) $300
D) $780
2. A smartphone costs $150. Sales tax is 6%. What is the total cost, including tax?
3. The total bill for your meal was $21. If you want to leave a 19% tip, how much would you leave for your waiter?
4. Jason bought a refrigerator that costs $550 before tax. He paid 8% of this amount in tax. What was his total cost of the refrigerator including tax?
A) $990
B) $558
C) $594
D) $506
5. A group of friends go to lunch. The bill for the meal, including tax, is $30. The service was good, so they leave a tip that is 20%. What is the total cost of the meal, with the tip?
Homework 10.5 Percent Increase Decrease
No work, no credit.
1. If the original quantity is 7 and the new quantity is 9, estimate the percent change.A) 100% decrease
B) 75% decrease
C) 25% increase
D) 50% increase
2. A savings account increases from $250 to $265 over one year due to interest. What is the percent of increase of the savings account?
3. At noon, a tank contained 20in of water. After several house, it contained 18 in of water. What is the percent of decrease of water in the tank?
4. The original quantity is 16 and the new quantity is 12. Karen incorrectly says the percent decrease is about 14.29%. What is the correct percent decrease? What mistake did she make?
The correct percent decrease is ______
A) She divided the different of the two quantities by the sum of the two quantities.
B) She divided the new quantity by the original quantity.
C) She divided the difference of the two quantities by the product of the two quantities.
D) She divided the difference of the two quantities by the new quantity.
Homework 10.6 Markups and Markdowns
No work, no credit
1. A diamond ring which normally sells for $1,080 is on sale for $756. A ruby ring which normally sells for $290 is on sale for $203. Find the percent markdown for each ring.Write a sentence comparing the percent markdowns for the two rings.
2. A department store buys 500 shirts at a cost of $13,500 and sells them at a selling price of $30 each. Find the percent markup. (Round to the nearest whole number if needed)
3. A store advertises a 30% markdown on a dishwasher with a selling price of $921. Find the sale price.
This is the greatest possible markdown that the store can discount the dishwasher without losing money. What does this tell you about the cost?
A) The cost is less than the markdown
B) The cost equals the sale price
C) The cost equals the markdown
D) The cost is greater than the sales price.
4. A music store bought a CD set at a cost of $20. When the store sold the CD set, the percent markup was 10%. Find the selling price.
Homework 10.7 Review for Test
No work, no credit
1. Decide whether the question is looking for the part, the percent or the whole. Then find it.80% of what number is 4?
2. A local little league has a total of 80 players, of whom 80% are left handed. How many left-handed players are there?
3. A student answers 80% of the questions correctly on a math exam. If she answers 20 questions correctly, how many questions were on the exam?
4. What is 20% of 90?
5. Using the formula I = PRT, if the simple interest on $6,000 for 7years is $3,780, then what is the interest rate?
6. Monica deposits $400 into a savings account that earns interest at a rate of 4.4%. Paul deposits $500 into a savings account that earns 2.5% interest. Who earned more interest in one year?
Homework 10.8 Review for Test
No work, no credit
1. If the original quantity is 10 and the new quantity is 11, what is the percent increase? (Round if needed)2. Last year the Economics Club had 25 members, this year there are 37 members. What is the percent of change in the number of club members. (Round to the nearest percent if needed)
3. If a salesperson sold $700 worth of televisions, and they earn a commission at a rate of 8%. How much commission did they earn?
4. Ryan has two options for a job. Option A says he can earn an hourly wage of $7.00 per hour. Option B says he can earn 8% commission. If he plans to work 12 hours and earn about $1900, which option is the better deal?
5. The selling price of an item is $385. It is marked down by 20%, but this sale price is still marked up from the cost of $280. Find the markup from cost to sale price.